Tung-Sol 12AT7 Pre Amp Tube F1228 No-Load master tone and also

No-Load master tone and also a master volume—allows for near-infinite tonal variations

switch the voltage to either 15 or 18 volts and plug into your pedal

your Martin D-18 is always ready to accompany you on your musical journey

A tighter low end makes it ideal for full chords as well as sustaining single notes

so players can capture that British chime today just as so many have done in the past

Tung-Sol 12AT7 Pre Amp Tube F1228 No-Load master tone and alsoThe 12AT7 combines two high transconductance triodes in a 9 pin miniature construction. Its low capacitance and high ratio of plate current to transconductance adapt it to use as a high frequency combined oscillator and mixer or as a grounded grid radio frequency amplifier.